I want to take a gap year to get better at tennis to possibly get recruited by D1 schools. During this time though, I will probably only be able to do 1 or 2 academic activities outside of practicing and playing tournaments. Will this hurt my chances at top schools if I am not recruited?
Look into a PG year at a tennis or sports academy which also has high school courses. Or a good prep school in tennis.
Have any coaches told you you are close to being recruited but just need a little more time? If not, I think you need to get an evaluation of where you stand before you spend a year trying to get recruited.